The training regimen of Oakley's athletes is a roster of pain and sweat with no time off for when the sun refuses to cooperate. That’s why they matched their RACING JACKET® frame with optics that maximize depth perception under mixed skies. Our G30™ lens boosts visual contrast in both flat/overcast light and medium light. It also features the unbeatable clarity of HIGH DEFINITION OPTICS® (HDO®). Lens venting is combined with ram-air surge ports to channel a cooling flow of breeze while UNOBTAINIUM® temple sleeves increase grip with perspiration.